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Diffstat (limited to 'sound/soc/codecs/ads117x.c')
-rw-r--r--sound/soc/codecs/ads117x.c123
1 files changed, 123 insertions, 0 deletions
diff --git a/sound/soc/codecs/ads117x.c b/sound/soc/codecs/ads117x.c
new file mode 100644
index 000000000000..cc96411ca3e6
--- /dev/null
+++ b/sound/soc/codecs/ads117x.c
@@ -0,0 +1,123 @@
+/*
+ * ads117x.c -- Driver for ads1174/8 ADC chips
+ *
+ * Copyright 2009 ShotSpotter Inc.
+ * Author: Graeme Gregory <gg@slimlogic.co.uk>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ */
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/device.h>
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/initval.h>
+#include <sound/soc.h>
+
+#include "ads117x.h"
+
+#define ADS117X_RATES (SNDRV_PCM_RATE_8000_48000)
+
+#define ADS117X_FORMATS (SNDRV_PCM_FMTBIT_S16_LE)
+
+struct snd_soc_dai ads117x_dai = {
+/* ADC */
+ .name = "ADS117X ADC",
+ .id = 1,
+ .capture = {
+ .stream_name = "Capture",
+ .channels_min = 1,
+ .channels_max = 32,
+ .rates = ADS117X_RATES,
+ .formats = ADS117X_FORMATS,},
+};
+EXPORT_SYMBOL_GPL(ads117x_dai);
+
+static int ads117x_probe(struct platform_device *pdev)
+{
+ struct snd_soc_device *socdev = platform_get_drvdata(pdev);
+ struct snd_soc_codec *codec;
+ int ret;
+
+ codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL);
+ if (codec == NULL)
+ return -ENOMEM;
+
+ socdev->card->codec = codec;
+ mutex_init(&codec->mutex);
+ INIT_LIST_HEAD(&codec->dapm_widgets);
+ INIT_LIST_HEAD(&codec->dapm_paths);
+ codec->name = "ADS117X";
+ codec->owner = THIS_MODULE;
+ codec->dai = &ads117x_dai;
+ codec->num_dai = 1;
+
+ /* register pcms */
+ ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
+ if (ret < 0) {
+ printk(KERN_ERR "ads117x: failed to create pcms\n");
+ kfree(codec);
+ return ret;
+ }
+
+ return 0;
+}
+
+static int ads117x_remove(struct platform_device *pdev)
+{
+ struct snd_soc_device *socdev = platform_get_drvdata(pdev);
+ struct snd_soc_codec *codec = socdev->card->codec;
+
+ snd_soc_free_pcms(socdev);
+ kfree(codec);
+
+ return 0;
+}
+
+struct snd_soc_codec_device soc_codec_dev_ads117x = {
+ .probe = ads117x_probe,
+ .remove = ads117x_remove,
+};
+EXPORT_SYMBOL_GPL(soc_codec_dev_ads117x);
+
+static __devinit int ads117x_platform_probe(struct platform_device *pdev)
+{
+ ads117x_dai.dev = &pdev->dev;
+ return snd_soc_register_dai(&ads117x_dai);
+}
+
+static int __devexit ads117x_platform_remove(struct platform_device *pdev)
+{
+ snd_soc_unregister_dai(&ads117x_dai);
+ return 0;
+}
+
+static struct platform_driver ads117x_codec_driver = {
+ .driver = {
+ .name = "ads117x",
+ .owner = THIS_MODULE,
+ },
+
+ .probe = ads117x_platform_probe,
+ .remove = __devexit_p(ads117x_platform_remove),
+};
+
+static int __init ads117x_init(void)
+{
+ return platform_driver_register(&ads117x_codec_driver);
+}
+module_init(ads117x_init);
+
+static void __exit ads117x_exit(void)
+{
+ platform_driver_unregister(&ads117x_codec_driver);
+}
+module_exit(ads117x_exit);
+
+MODULE_DESCRIPTION("ASoC ads117x driver");
+MODULE_AUTHOR("Graeme Gregory");
+MODULE_LICENSE("GPL");